1,740 research outputs found
Statistical Characteristics of Backward Glancing while Natural Driving on Expressway
International audienceIntervals of backward glancing during expressway driving were measured and statistical character was analysed. The main aim of the analysis was to clarify variety of backward glancing manner while no intentional manoeuvring such as lane changing was performed. Eleven subjects drove totally 113 trips and 11,105 backward glances were extracted and analysed. The distribution of the intervals of backward glances was parameterized using mixture of two lognormal distributions. There were large differences in the interval distribution among subjects and even within a subject. Statistical tests showed some factors such as distance to preceding/following car affect to the distribution, but the manner of the effect also varies among subjects
Guidelines for the design of haptic widgets
Haptic feedback has been shown to improve user performance in Graphical User Interface (GUI) targeting tasks in a number of studies. These studies have typically focused on interactions with individual targets, and it is unclear whether the performance increases reported will generalise to the more realistic situation where multiple targets are presented simultaneously. This paper addresses this issue in two ways. Firstly two empirical studies dealing with groups of haptically augmented widgets are presented. These reveal that haptic augmentations of complex widgets can reduce performance, although carefully designed feedback can result in performance improvements. The results of these studies are then used in conjunction with the previous literature to generate general design guidelines for the creation of haptic widgets
Predicting and verifying transition strengths from weakly bound molecules
We investigated transition strengths from ultracold weakly bound 41K87Rb
molecules produced via the photoassociation of laser-cooled atoms. An accurate
potential energy curve of the excited state (3)1Sigma+ was constructed by
carrying out direct potential fit analysis of rotational spectra obtained via
depletion spectroscopy. Vibrational energies and rotational constants extracted
from the depletion spectra of v'=41-50 levels were combined with the results of
the previous spectroscopic study, and they were used for modifying an ab initio
potential. An accuracy of 0.14% in vibrational level spacing and 0.3% in
rotational constants was sufficient to predict the large observed variation in
transition strengths among the vibrational levels. Our results show that
transition strengths from weakly bound molecules are a good measure of the
accuracy of an excited state potential.Comment: 7 pages, 7 figure
Pattern Stability and Trijunction Motion in Eutectic Solidification
We demonstrate by both experiments and phase-field simulations that lamellar
eutectic growth can be stable for a wide range of spacings below the point of
minimum undercooling at low velocity, contrary to what is predicted by existing
stability analyses. This overstabilization can be explained by relaxing Cahn's
assumption that lamellae grow locally normal to the eutectic interface.Comment: 4 pages, 5 eps figure
Coherent transfer of photoassociated molecules into the rovibrational ground state
We report on the direct conversion of laser-cooled 41K and 87Rb atoms into
ultracold 41K87Rb molecules in the rovibrational ground state via
photoassociation followed by stimulated Raman adiabatic passage.
High-resolution spectroscopy based on the coherent transfer revealed the
hyperfine structure of weakly bound molecules in an unexplored region. Our
results show that a rovibrationally pure sample of ultracold ground-state
molecules is achieved via the all-optical association of laser-cooled atoms,
opening possibilities to coherently manipulate a wide variety of molecules.Comment: 4 pages, 4 figure
Reação de genótipos de soja diferenciadores à ferrugem da soja coletada no Brasil entre 2011 e 2014.
Asian soybean rust (ASR) is one of the important diseases which reduce soybean yield. Most economic control measure of the disease is the use of genetic resistance. To effectiveness of resistance genes to ASR, soybean reactions of differential genotypes were monitored during four cropping seasons from 2010/11 to 2013/14. Samples of leaflets infected with rust were collected from soybean fields in states of Rio Grande do Sul, Paraná, Mato Grosso do Sul, Mato Grosso, Goiás, Distrito Federal and Rondônia. Sixteen differential genotypes (18 in 2012/13 and 2013/14) for soybean rust, having resistance gene, Rpp1-Rpp6, Rpp2+Rpp4+Rpp5, and without resistance genes were inoculated with urediniospores collected from 19 samples. Soybean reaction was rated approximately 14 days after inoculation based on the number of uredinia per lesion and sporulation level. There was no clear evidence of geographical and temporal differentiation. Of the sixteen differentials used for all seasons, Shiranui (Rpp5), PI 587855 (Rpp1-b), PI 587880A (Rpp1-b), PI 587905 (Rpp1-b) and PI 594767A (Rpp1-b) showed a resistant reaction to half or more of samples throughout the period. No6-12 having Rpp2+Rpp4+Rpp5 was resistant to all the samples collected 2012/13 and 2013/14. There was a tendency that PI 459025 (Rpp4) increased the proportion of resistant reactions over the period
Comparative study of some dynamic properties of liquids and grains in the classroom
Visando entender as diferenças entre as propriedades dinâmicas dos materiais granulares e as propriedades dinâmicas dos lÃquidos, foram realizados experimentos usando água e grãos de arroz e açúcar. Os experimentos requerem poucos recursos e foram pensados para que possam ser desenvolvidos com facilidade na sala de aula ou num laboratório de ensino. Os resultados mostraram que o fluxo de grãos difere significativamente do fluxo de lÃquidos.In order to understand the differences in the dynamic properties between granular materials and liquids, experiments using water, rice and sugar grains were performed. The experiments require few material resources and were thought so as to be easily made in a classroom or in a teaching laboratory. The results showed that grain's flow differs significantly from that of liquids.Banco Santande
Transnational TESOL professionals and teaching English for glocalized communication (TEGCOM)
How should we write our research? ... the question reflects a central postmodernist realization: all
knowledge is socially constructed. Writing is not a 'true' representation of an objective 'reality';
instead, language creates a particular view of reality. ... All social scientific writing depends upon
narrative structure and narrative devices, although that structure and those devices are frequently
masked by a 'scientific' frame, which is, itself, a metanarrative (c.f. Lyotard, 1979). ... Can we
construct a sociology in which narrated lives replace the narrative of unseen, atemporal, abstract
'social forces'? (Laurel Richardson, 1997, pp. 26-27)postprin
Osteoarthritis or osteoarthrosis: the definition of inflammation becomes a semantic issue in the genomic era of molecular medicine
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